assistant: Add support for claude-3-7-sonnet-thinking (#27085)

Closes #25671

Release Notes:

- Added support for `claude-3-7-sonnet-thinking` in the assistant panel

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>
Co-authored-by: Antonio Scandurra <me@as-cii.com>
Co-authored-by: Agus Zubiaga <hi@aguz.me>

crates/language_models/src/settings.rs

@@ -109,6 +109,7 @@ impl AnthropicSettingsContent {
                                     max_output_tokens,
                                     default_temperature,
                                     extra_beta_headers,
+                                    mode,
                                 } => Some(provider::anthropic::AvailableModel {
                                     name,
                                     display_name,
@@ -124,6 +125,7 @@ impl AnthropicSettingsContent {
                                     max_output_tokens,
                                     default_temperature,
                                     extra_beta_headers,
+                                    mode: Some(mode.into()),
                                 }),
                                 _ => None,
                             })